Answer:
The Kinetic energy of the goose = 56.071 J
Explanation:
Kinetic Energy: This can be defined as the energy of a body in motion.
Mathematically, it can be expressed as
Ek = 1/2mv²................................ Equation 1.
Where Ek = kinetic energy of the goose, m = mass of the goose, v = velocity of the goose.
Given: m = 20.5 lb, and v = 7.8 miles/h.
Conversion: (i) If 1 lb = 0.45 kg,
then, 20.5 lb = 0.45(20.5) = 9.225 kg.
Also, (ii) If 1 mile/h = 0.447 m/s
then, 7.8 miles/h = 0.447×7.8 = 3.4866 m/s
Therefore, m = 9.225 kg, v = 3.4866 m/s
Substituting into equation 1
Ek = 1/2(9.225)(3.4866)²
Ek = 4.6125×12.1564
Ek = 56.071 J.
Thus the Kinetic energy of the goose = 56.071 J
